A new layer of security could be initiated with the idea of moving security checkpoints outside of the airports.

Istanbul had placed armed officers at the airports entrance which disrupted the three bombers plans, forcing them to split up. It's believed the death toll would have been much higher had the external forces not been present.

The concept of moving the checkpoints outside to the curb or inspecting cars as they enter the airports could prevent terrorists from making it inside.

Aviation security expert Denny Kelly says it would be expensive and inconvenient. "People are going to be late for their flights and miss their flights."

He also went on to say the outside system won't work "because if someone is willing to give up their life, you're not gonna stop them by putting a mirror under their car."

Kelly says the idea is unlikely to every become a reality.

Related: Also see some of the strange items the TSA has confiscated:

25PHOTOS

Some of the strangest and most terrifying objects TSA has confiscated

See Gallery

Some of the strangest and most terrifying objects TSA has confiscated

A Newark (EWR) traveler attempted to take their hoe on the plane. If you need to travel with your gardening hoe, it’ll have to go in your checked bag.

Packing list: Socks. ✅ Toothbrush. ✅ Curling Iron. ✅ Post-apocalyptic bullet-adorned gas mask. ❌ While gas masks are allowed in carry-on bags, replica bullets are not. This was discovered in a carry-on bag at Miami (MIA). Maybe he was catching a one way flight to #FuryRoad?

Talk about deadheading... This crusty ol' chap is actually a prop from the #TexasChainsawMassacre movie. He was brought through a checkpoint at the Atlanta (#ATL) International Airport, where as you can see, he was screened and sent on his jolly way. #TSAOnTheJob

We’re pretty sure this isn’t a letter opener. A bladed dragon claw perhaps??? Whatever it is, it should be packed in checked baggage. It was discovered in a carry-on bag at Atlanta (ATL).

This ornate flask of black powder was discovered in a carry-on bag at Allentown (ABE). While it is a fancy flask, the black powder contained within is an explosive and is strictly prohibited in both carry-on and checked bags.

Attention! This is not a drill… It’s just a really large wrench. Tools over 7” must be packed in checked baggage. Especially 18-inch crescent wrenches like this one that our officers discovered in a carry-on bag at New York Kennedy Airport (JFK). #TSATravelTips

With a simple unsnap and pull, this mild mannered belt becomes BELT KNIFE! Clever idea, but a bad idea to wear it through the checkpoint or pack it in your carry-on bag. Concealed weapons can lead to fines and arrest. Please pack items such as this in your checked baggage. This was discovered in a carry-on bag at the Detroit Metropolitan Airport (DTW). #TSAGoodCatch

While some travelers are worried about packing nail clippers (they are allowed), others pack a pair of five-bladed floggers. You guessed it; these are not allowed in carry-on bags. If you’re in a situation where you’re going to need your floggers, they’ll have to be packed in checked baggage. These were discovered last week in a carry-on bag at the George Bush Intercontinental Airport in Houston, Texas (IAH). #TSATravelTips

#TSAGoodCatch - This knife was discovered concealed in a bottle of pills at the San Francisco International Airport (SFO). Concealed knives can lead to fines and arrest. Please pack them in your checked bag.

#TSAGoodCatch - This comb dagger was discovered in a carry-on bag at the Lihue Airport (LIH) in Hawaii. Knives are always prohibited in carry-on bags no matter the size. Concealed knives can lead to fines and arrest.

#TSAGoodCatch - This cane sword was detected recently in a passenger’s carry-on property at Las Vegas (LAS). All knives and swords are prohibited in carry-on bags, and concealed items can lead to arrest and fines.

#TSAGoodCatch - This push dagger was discovered in a package of gum at the Detroit Metropolitan Airport (DTW). Knives are always prohibited from carry-on bags, but concealed knives can lead to fines and arrest.

#TSAGoodCatch - Another #Batarang was discovered in a carry-on bag. This time it was at the Chicago O'Hare International Airport (ORD). Next time, leave your batarang in the bat cave, #Batman!

#TSAGoodCatch - A throwing star was discovered in a carved-out compartment in a wooden cellphone case at Ontario (ONT) in a carry-on bag. Concealed items can lead to fines and arrest.

#TSAGoodCatch - This #bejeweled lipstick stun gun was discovered in a carry-on bag at the Hartsfield–Jackson Atlanta International Airport (ATL). All stun guns are prohibited from being packed in carry-on bags or carried on your person.

#TSAGoodCatch - These neon green faux blood adorned machetes and throwing knives were discovered in a carry-on bag at the Portland International Airport (PDX). While machetes and throwing knives are prohibited in carry-on bags, they may be packed in checked baggage that goes in the luggage hold under the plane.

#TBT April, 2014 - An 8.5” knife was discovered inside an enchilada at the Sonoma County Airport (STS). While this was a great catch, the passenger’s intent was delicious, not malicious, and she was cleared for travel. It’s always important to double check your bags and enchiladas.

#TBT - May 2014 - This mallet was discovered in a traveler’s carry-on property at the Burlington International Airport (BTV). Items such as sledgehammers and mallets are considered bludgeons and are prohibited from being packed in carry-on bags. Checked baggage is fine.

#TSAGoodCatch - This ice pick concealed inside of a cane was discovered in a traveler’s carry-on property at Newark (EWR). Concealed weapons can lead to fines and arrest.

#TSAGoodCatch - These nunchucks were discovered in a traveler’s carry-on bag at the Newark Liberty International Airport (EWR). Nunchucks are prohibited from being transported in carry-on bags, but may be packed in checked bags as long as they’re not illegal where you are traveling.

#TSATravelTips - Marijuana was discovered concealed in a jar of peanut butter in a checked bag at San Jose (SJC). As we’ve said before, we’re not looking for illegal narcotics, but we have to report them to law enforcement when discovered. #TSAGoodCatch

#TSAGoodCatch - This key knife was discovered at the Erie International Airport (ERI). All knives are prohibited from carry-on bags. Concealed knives can lead to arrests and fines.

#TBT December 2013 - This loaded 9mm was discovered in a shoe inside a carry-on bag at the Grand Junction Regional Airport (GJT). This is one of the 1,813 firearms that were discovered in carry-on bags in 2013. 1,477 of those were loaded. While firearms are prohibited in carry-on bags, you can pack them in your checked baggage, as long as you meet the packing guidelines: bit.ly/travelingwithfirearms.

#TBT August 2011 -- Two birds were discovered during a pat-down that was being administered due to bulky clothing at the Los Angeles International Airport (LAX). They were wrapped in socks and taped to the leg and chest of a woman who was traveling to China. @USFWS officers arrested the woman on suspicion of smuggling and exporting an endangered species out of the United States. #TSAGoodCatch